test(doctor): fix existsSync mock for agentmemory service on linux

Author: gracefullight

cli/commands/doctor/doctor.test.ts

@@ -347,7 +347,8 @@ describe("AgentMemory doctor checks", () => {
 
   it("reports missing AgentMemory binary when a service file is installed", async () => {
     vi.mocked(existsSync).mockImplementation((p) =>
-      String(p).endsWith("dev.oma.agentmemory.plist"),
+      String(p).endsWith("dev.oma.agentmemory.plist") ||
+      String(p).endsWith("oma-agentmemory.service"),
     );
 
     const reportPromise = collectDoctorReport();